Fully Kinetic, Electromagnetic Particle-in-Cell Simulations of Plasma Microturbulence

作     者：J.L.V.Lewandowski L.E.Zakharov Plasma Physics 

作者机构：LaboratoryPrinceton UniversityP.O.Box 451PrincetonNJ 08543USA. 

出 版 物：《Communications in Computational Physics》 (计算物理通讯（英文）)

年 卷 期：2007年第2卷第4期

页      面：684-722页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

主　　题：Plasma micro-turbulence particle-in-cell simulation multigrid solver. 

摘      要：A novel numerical method,based on physical intuition,for particle-in-cell simulations of electromagnetic plasma microturbulence with fully kinetic ion and electron dynamics is *** method is based on the observation that,for lowfrequency modes of interest[ω/ω_(ci)≪1,ωis the typical mode frequency andωci is the ion cyclotron frequency]the impact of particles that have velocities larger than the resonant velocity,v^(r)∼ω/k_(||)(k_(||) is the typical parallel wavenumber)is negligibly small(this is especially true for the electrons).Therefore it is natural to analytically segregate the electron response into an adiabatic response and a nonadiabatic response and to numerically resolve only the latter:this approach is termed the splitting ***,the exact separation between adiabatic and nonadiabatic responses implies that a set of coupled,nonlinear elliptic equations has to be solved;in this paper an iterative technique based on the multigrid method is used to resolve the apparent numerical *** is shown that the splitting scheme allows for clean,noise-free simulations of electromagnetic drift waves and ion temperature gradient(ITG)*** is also shown that the advantage of noise-free kinetic simulations translates into better energy conservation properties.